Photographic-plate holder.



Patented Oct. 2|, I902.

No. mm.

B. scHUTTAuF. PHOTOGRAPHIC PLATE HOLDER.

Application filed Mar. 28. 1902.)

2 Sheets-Sheet I.

(No Model.)

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Patented Oct. 2|, l902.

No. mm.

B. SCHUTTAUF.

PHOTOGRAPHIC PLATE HOLDER.

(Application filed In. 28. 1902) {Shuts-Shani.

(No Model.)

71 667 ceased;

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UNITED STATES PATENT OFFICE.

RICHARD SCHIITTAUF, OF JENA, GERMANY, ASSIGNOR TO FIRM OF CARL ZEISS, OFJENA, GERMANY.

PHOTOGRAPHlC-PLATE HOLDER.

SPECIFICATION formingpart of Letters Patent No. 711,741, dated October21, 1902.

Application filed March 28, 1902. Serial No. 100,383. (No model.)

T0 (0 whom it may concern:

Be it known that I, RICHARD SoHiiTTAUE, mathematician, a subject of theKing of Prussia, German Emperor, residing at Carl Zeiss Strasse, Jena,in the Grand Duchy of SaxeWeimar, German Empire, have invented a new anduseful Photographic-Plate Holder, of which the following is aspecification.

The object of the invention is to secure only by constructionalmeans,without any particular care or precision in the manufacture,conformity of the individual photographic-plate holders of the samepattern as to the relative position of those parts which the coincidenceof the sensitized surface with the focal plane of the lens depends upon.

Photographic-plate holders have in general inside their frame a set ofinwardly-directed plane surfaces which are situated in a single planeand serve as an abutment for the sensitized side of the plate, and theyhave outside the frame, also in a single plane parallel to the first,another set of plane surfaces having a contrary (outward) direction anddesigned to be brought in contact with similar plane surfaces in theback frame of the camera, so as to correctly locate the plate-holder inthe camera. The conformity mentioned above is attained if in allplate-holders the said two parallel planes-the plane of the insideabutment-surfaces and the plane of the outside abutment-surfaceshave thesame distance from each other. The invention realizes exact coincidenceof these two planes by providing the inside surfaces on one and theoutside surfaces on the other of two constructional parts and unitingthese parts (by means of outer extensions of the inside surfaces andinner extensions of the outside surfaces) in the plane common to bothsets of surfaces.

Figure 1 is an elevation of a plate-holder frame constructed accordingto the invention. Fig. 2 is a section on the line 2 2 in Fig. 1. Fig. 3is a section on the line 3 3 in Fig. 1. Fig. 4 is a section on the line4 at in Fig. 1. Fig. 5 is an elevation of another plate-holder frameconstructed according to the invention. Fig. 6 is a section on the line6 6 in Fig. Fig. 7 is a section on the line 7 7 in Fig. Fig. 8 is asection on the line 8 8 in Fig. 5.

In the double plate-holder shown in Figs. 1 to 4 the main part a. of theframe includes two traverses b and c of U-shaped cross-section. Theopposite inward surfaces of each traverse serve as abutment-surfaces forthe sensitized plates. The outside set of abutment-surfaces consists ofthe opposite outward surfaces of the outer parts of couples of sheetsbandc Thesesheetsprojectthrough the side bars of the main frame a and are$01- dered on the extremities of the traverses b and c by means of avery thin layer of solder, so that practically the outer extensions ofthe inside abutment-surfaces and the inner extensions of the outsideabutment-surfaces are in contact and both sets of abutment-surfaces aresituated in one single plane.

In the second example of the invention (shown in Figs. 5 to 8) arectangular intermediate frame ls presents in the outer parts of itsopposite (front and back) surfaces the outside abutment-surfaces. Theinside abutment -surfaces are presented by the inner parts of theframe-bars Z and m. The intermediate frame It and the frame-bars Z and mare screwed together in such a way that the inner extensions of theoutside abutment-surfaces and the outer extensions of the insideabutment surfaces are in direct contact. Therefore in this case theplane of the outside abutment-surfaces coincides exactly with the planeof the inside abutment-surfaces.

That I claim as my invention, and desire to secure by Letters Patent, is

1. A photographic-plate holder having both the inside plateabutment-surfaces and the outside camera abutment-surfaces in one singleplane, but on different constructional parts, which are in contact inthe said single plane, essentially as described.

2. A photographic-plate holder having both the inside plateabutment-surfaces and the outside camera abutment-surfaces in one singleplane, but on different constructional parts, which are in contact inthe said single plane by means of inward extensions of the outsideabutment-surfaces and outward extensions of the insideabutment-surfaces, essentially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

RICHARD SCHIITTAUF.

Witnesses:

EMIL DONITZ, PAUL KRi'IGEE.

